کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1291253 973351 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inhomogeneous compression of PEMFC gas diffusion layer: Part I. Experimental
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Inhomogeneous compression of PEMFC gas diffusion layer: Part I. Experimental
چکیده انگلیسی

This paper presents a study on the effect of inhomogeneous compression of gas diffusion layer (GDL) caused by the channel/rib structure of flow-field plate. The experimentally evaluated properties are GDL intrusion into the channel, gas permeability, in-plane and through-plane bulk electric conductivities, and contact resistances at interfaces as a function of compressed thickness of GDL. It was found that the GDL is compressed very little under the channel whereas GDL under the rib is compressed to gasket thickness. The compression of GDL reduces gas permeability and contact resistance, and improves bulk conductivity. Hence, the inhomogeneous compression of GDL may lead into significant local variation of mass and charge transport properties in the GDL. These effects have been ignored in most of the published modeling studies. This contribution, part I, covers the experimental setup and measurement results, and a model which takes the inhomogeneous compression of GDL into account is presented in part II.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 171, Issue 1, 19 September 2007, Pages 26–36
نویسندگان
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